Optical fiber distributed feedback laser
US5844927A · kind A · utility
99Cited by
7References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1996 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | Mar 20, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/102
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical end-pumped fiber laser doped with one or more rare-earths and with distributed feedback (DFB) via a fiber Bragg-grating, which is oscillating on two orthogonally polarized wavelengths. The distance between the wavelengths may be tuned by changing the birefringence of the fiber. The laser may be applied as a polarimetric sensor in which an asymmetrical force changes the wavelength separation, or as a tunable two-wavelength source. A particular preferred field of application is for measuring the pressure in pipes, to determine the flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.